ISHS Acta Horticulturae 398: Postharvest Physiology of Fruits
COMPOSITION OF CELL-WALL POLYSACCHARIDES DURING FRUIT SOFTENING IN 'TONEWASE' JAPANESE PERSIMMON |
| Authors: | H. Itamura, T. Tanigawa, H. Yamamura |
| Keywords: | Soluble polyuronide, Hemicellulose, Ethylene, Fruit softening, Japanese persimmon |
| Abstract:
We studied changes in cell-wall soluble polyuronides and the hemicellulosic neutral-sugar composition of 'Tonewase' Japanese persimmon during fruit softening. After treatment for removal of astringency, the fruit of 'Tonewase' grown by forcing culture under cover softened more rapidly (with a rapid increase in ethylene production) than fruit grown in an open orchard. Changes in the concentration of soluble polyuronides seemed to have no direct relationship to the softening of 'Tonewase' grown under cover or in an open field. The concentrations of galactose, arabinose, xylose, glucose, and rhamnose residues of hemicellulose (and therefore of total hemicellulose) in cell walls decreased during softening of the fruit grown in an open field. These results show that the decreased hemicellulose concentration in 'Tonewase' grown in an open field had a close relationship with fruit softening. | |
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